Exterior shell of a truck bumper and air dam



FIG. 1 is a top perspective view of an exterior shell of a truck bumper and air dam showing our new design, it being understood that the broken lines are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a top perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a side elevation view of one side thereof, the opposite side being a mirror-image of the one side;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for an exterior shell of a truck bumper and air dam, as shown and described. 